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Finding the Fourth Proportional to 103,641.60, 155,243.70 and 92,560.80

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Solution

The fourth proportional to 103,641.60, 155,243.70 and 92,560.80 is: 138,645.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,641.60 : 155,243.70 = 92,560.80 : x
  2. Step 2: Convert to fraction form
    103,641.60/155,243.70 = 92,560.80/x
  3. Step 3: Cross multiply
    103,641.60x = 155,243.70 × 92,560.80
  4. Step 4: Simplify right side
    103,641.60x = 14,369,481,066.96
  5. Step 5: Solve for x
    x = 14,369,481,066.96/103,641.60
  6. Step 6: Final answer
    x = 138,645.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.